The upcoming video game prequel Batman: Arkham Origins will be introducing some longtime fan favorite characters into the series’ mythos. With Black Mask at the center of the plot and Deathstroke, Firefly, Copperhead, and others hot on Batman’s trail, it’s going to be a long night for the dark knight as the game unfolds. There is still a great deal of secrecy surrounding much of the game, with only five of Black Mask’s eight assassins officially revealed, but another has just been sniffed out.

IGN managed to get their hands on the achievement list for the game and it reveals a few unconfirmed things about the game, the least surprising of which is that the Riddler will once again be featured in the game along with his “Riddler Trophies” for players to collect. One thing developer Warner Bros. Montreal likely didn’t want us to know is the identity of the sixth assassin: Lady Shiva.

Created by Dennis O’Neil and Ric Estrada, Lady Shiva is one of the most talented assassins in the DC Universe and her presence in the game should come as no surprise given her abilities. What do you think of the character’s inclusion in the game? Sound off below!

Batman: Arkham Origins will be available for the Wii U, PlayStation 3, Xbox 360, and PC on October 25, 2013.